/Engine/Source/Runtime/Experimental/Chaos/Public/GeometryCollection/GeometryCollectionClusteringUtility.h
Moved the selected bones closer to the root
static void CollapseHierarchyOneLevel ( [FGeometryCollection](API\Runtime\Chaos\GeometryCollection\FGeometryCollection) * GeometryCollection, [TArray](API\Runtime\Core\Containers\TArray)< int32 > & SourceElements )